A note about other another review site: Frostytech provides very rigorous reviews, with sound measurements and even playable sound clips, but - and it's a big but - for some reason they have pulled all their Swiftech reviews, despite the fact that their MCX4000 review had it at the top of their performance charts. They have even pulled the Swiftech data from the comparison charts in all their other reviews.... weird. No explanation given - it really reflects badly on their objectivity. Anyone know what happened?

P4 reviews -- depends when I have enough of them to make it worthwhile. Many samples have been promised, but some have yet to arrive. Maybe as early as 2 weeks -- to a month.

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Frostytech provides very rigorous reviews, with sound measurements and even playable sound clips

Yeah, I agree -- except about the sound measurements: they're doing that in a wee little box. Boundary effects boost all the frequencies below ~500Hz & will tend to reduce differences between the different samples. I looked into doing this in a large closet and tossed out the idea after conferring with a bunch of acoustics experts. I agree it is nice they try but take that noise measurement with a healthy dose of caution.

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They have even pulled the Swiftech data from the comparison charts in all their other reviews.... Anyone know what happened?

I noticed this as well. It does seem odd & suggests some kind of conflict between Frosty & Swifty.

Frostytech provides very rigorous reviews, with sound measurements and even playable sound clips

with the sound measurements MikeC I think they're useful not as the context of sound measurements but as a reference for compariablity between the Heatsinks, the way they've setup their box I think would mean that the acoustic results across all the heatsinks are repeatable so no other variables can mess round with their readings (like a loud car driving by ) so u can see which heatsinks are louder in the enclosure in relative terms to the other one's that they test.

_________________Nothing is impossible: Somethings are not worth the effort to achieve.

u can see which heatsinks are louder in the enclosure in relative terms to the other one's that they test

That's the point. YOu can't really see if the differences get minimized by boundary effects. (Also, I'd be surprised if they get much more than ~10 dBA attentuation in the box. You'd be surprised what it takes to block out noise!)

If all the under 500Hz readings are boosted by say 10 dB, it has the effect of compressing the differences between the HSF. Sort of like "FM radio announcer voice" effect -- some mics (studios, stations, whatever) deliberately add a huskiness to all male voices (by boosting certain bands in the lower midrange and low frequencies). As a result, they all sound kind of similar - rich warm sexy voice.

That's the kind of effect recording in a small box has.

I still think it's great that they try, and it does give some idea of noise levels.

the only place where I think u'd get low noise attentuation either the best out at sea in the middle of nowhere or maybe REALLY late at night so all u'd have is maybe 50Hz noise (not even), Or maybe one of my Uni lectures as well cause all the noise u hear is ppl nodding off silence.... I think the best way would be to measure the Change in dB from ambient to what the noise level is after

_________________Nothing is impossible: Somethings are not worth the effort to achieve.

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